Could there be some guarding reflex, that detects irregular sound or the absence of regular sounds and jump starts the sleeping mammal if predator presence is d

Could there be some guarding reflex, that detects irregular sound or the absence of regular sounds and jump starts the sleeping mammal if predator presence is detected? https://dash.harvard.edu/bitstream/handle/1/5342191/Acerbi%20and%20Nunn%20AB.pdf?sequence=1 https://dash.harvard.edu/bitstream/handle/1/5342191/Acerbi%2... http://the.sleep.ru/lib/NeurosciBiobehavRev_2008_dolphins.pdf http://the.sleep.ru/lib/NeurosciBiobehavRev_2008_dolphins.pd...